diff options
| author | Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> | 2016-03-10 18:33:07 -0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-13 22:29:07 -0400 |
| commit | cea8768f333e3f0bc231d8b815aa4a9e63fa990c (patch) | |
| tree | 60bf6ef493bdc7f9816f4c62f65b7aa106a9a0ce /net/sctp/output.c | |
| parent | 6f15cdbf8a8ac2e22767cc8b1eae225702733c95 (diff) | |
sctp: allow sctp_transmit_packet and others to use gfp
Currently sctp_sendmsg() triggers some calls that will allocate memory
with GFP_ATOMIC even when not necessary. In the case of
sctp_packet_transmit it will allocate a linear skb that will be used to
construct the packet and this may cause sends to fail due to ENOMEM more
often than anticipated specially with big MTUs.
This patch thus allows it to inherit gfp flags from upper calls so that
it can use GFP_KERNEL if it was triggered by a sctp_sendmsg call or
similar. All others, like retransmits or flushes started from BH, are
still allocated using GFP_ATOMIC.
In netperf tests this didn't result in any performance drawbacks when
memory is not too fragmented and made it trigger ENOMEM way less often.
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/output.c')
| -rw-r--r-- | net/sctp/output.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/sctp/output.c b/net/sctp/output.c index 9d610eddd19e..736c004abfbc 100644 --- a/net/sctp/output.c +++ b/net/sctp/output.c @@ -153,7 +153,7 @@ void sctp_packet_free(struct sctp_packet *packet) */ sctp_xmit_t sctp_packet_transmit_chunk(struct sctp_packet *packet, struct sctp_chunk *chunk, - int one_packet) + int one_packet, gfp_t gfp) { sctp_xmit_t retval; int error = 0; @@ -163,7 +163,7 @@ sctp_xmit_t sctp_packet_transmit_chunk(struct sctp_packet *packet, switch ((retval = (sctp_packet_append_chunk(packet, chunk)))) { case SCTP_XMIT_PMTU_FULL: if (!packet->has_cookie_echo) { - error = sctp_packet_transmit(packet); + error = sctp_packet_transmit(packet, gfp); if (error < 0) chunk->skb->sk->sk_err = -error; @@ -376,7 +376,7 @@ static void sctp_packet_set_owner_w(struct sk_buff *skb, struct sock *sk) * * The return value is a normal kernel error return value. */ -int sctp_packet_transmit(struct sctp_packet *packet) +int sctp_packet_transmit(struct sctp_packet *packet, gfp_t gfp) { struct sctp_transport *tp = packet->transport; struct sctp_association *asoc = tp->asoc; |